33023201221 has 4 divisors (see below), whose sum is σ = 33079459392. Its totient is φ = 32966943052.

The previous prime is 33023201213. The next prime is 33023201249. The reversal of 33023201221 is 12210232033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33023201221 - 2³ = 33023201213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33023207221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28128205 + ... + 28129378.

It is an arithmetic number, because the mean of its divisors is an integer number (8269864848).

Almost surely, 2^33023201221 is an apocalyptic number.

It is an amenable number.

33023201221 is a deficient number, since it is larger than the sum of its proper divisors (56258171).

33023201221 is an equidigital number, since it uses as much as digits as its factorization.

33023201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56258170.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 33023201221 its reverse (12210232033), we get a palindrome (45233433254).

It can be divided in two parts, 330232012 and 21, that added together give a palindrome (330232033).

The spelling of 33023201221 in words is "thirty-three billion, twenty-three million, two hundred one thousand, two hundred twenty-one".